string operations -> comparisons

README.Rmd

@@ -23,7 +23,7 @@ special values *interlaced* with the regular values in a column (e.g. `N/A`,
 `REFUSED`, `-99`, etc.). Unfortunately, the missing reasons are
 lost when these values are all converted into a single `NA` type. Working
 with missing reasons has traditionally required loading all variables as
-character vectors and doing a bunch of string operations and type conversions
+character vectors and doing a bunch of string comparisons and type conversions
 to make sense of them.
 
 Interlacer was created based on the insight that values and missing reasons